Kinetics of Formation of SrWO4 in the Solid State Reaction Between WO3 and SrCOs

Abstract

The solid state reaction WO3 + SrCO3 → SrWO4 + CO2 was studied with the reactants in form both of separate pellets and of powder mixtures. As for pellets, by an application of Wagner's method it was possible to state that the governing process is the cation counterdiffusion involving W6+ and Sr2+. Thermogravimetric measurements in the temperature range 663° —755 °C on equimolar powder mixtures and with SrCO3 in a specially prepared spherulitic form were interpreted using Diinwald-Wagner's equation. © 1974, Walter de Gruyter. All rights reserved.